NTSTATUS
RawFileSystemControl(
  IN  PVCB Vcb,
  IN  PIRP Irp,
  IN  PIO_STACK_LOCATION IrpSp
  );

Routine Description:

    This routine implements the FileSystem control operations

Arguments:

    Vcb - Supplies the volume being queried.

    Irp - Supplies the Irp being processed.

    IrpSp - Supplies parameters describing the FileSystem control operation.

Return Value:

    NTSTATUS - The status for the IRP